The nitrogen fertilizer transfer technology is suitable for high-yield wheat fields, especially for strong gluten wheat. In traditional wheat cultivation, the base fertilizer usually accounts for 60%-70%, and topdressing accounts for 30%-40%. The topdressing time is generally during the returning green period to the beginning period. In addition, when wheat is poured into winter water before winter, a top dressing is added, so that nitrogen fertilizer is reapplied in the early stage of wheat breeding. In high-yielding fields, this will cause the wheat field population to be too large, increase the number of ineffective tillers, close the fields in the mid-fertility of wheat, and tend to premature aging and lodging in later stages, affecting the yield and quality, and the use efficiency of nitrogen fertilizers is low.
The nitrogen fertilizer transfer technology combines one-time application of nitrogen fertilizers at the bottom and topdressing. The proportion of base fertilizer and topdressing fertilizer is 50% each, and the proportion of base fertilizer with high soil fertility is 30%-50%, and the proportion of topdressing fertilizer is 70%- 50%. At the same time, the spring topdressing time is shifted backwards, and generally moved to the jointing stage. The soil with high soil fertility and high tiller-to-spike ratio can be moved to the middle of the jointing season to the tip of the flag leaf.
This technique can effectively control the excessive proliferation of ineffective tiller in spring and shape the plant type of the flag leaf and the inverted two leaves. The unit area of ​​land contains more panicles, the accumulation of photosynthetic products after flowering is more, and the distribution ratio to the grain is large; Under the roots, increase the proportion of roots in the deep soil and the root activity in the late growth stage, delay aging and increase grain weight; increase grain protein content and improve wheat quality; reduce nitrogen loss, increase nitrogen use efficiency, and reduce nitrogen leaching.
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